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Donegan OSC OptiSIGHT Binocular Magnifying Visor, Gray
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Donegan OSC OptiSIGHT Binocular Magnifying Visor, Gray

List Price: $39.56
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The Donegan OSC OptiSIGHT is a hands-free, headband binocular magnifier that has an optical-grade, acrylic lens ground and polished into a prismatic lens, and is available in multiple dioptric strengths which provide a specific magnification power (X) at a specified focal length, or distance from object. This magnifier enhances the size and resolution of an object or image, and is commonly used for a variety of applications, such as jewelry-making, watch-making, needlework, artwork, electronic inspection, book-reading, print inspection, and stamp-collecting.

The OSC OptiSIGHT magnifier features replaceable binocular lenses that have beveled edges, and are mounted in an interchangeable plastic frame. An adjustable headband with a padded leather comfort band conforms to a variety of head sizes and provides comfort for hours of continuous use. The magnifier can be worn over prescription or safety eyeglasses. A durable, plastic visor tips up above the forehead when not in use. Spring-loaded pivot screws hold the visor in a raised or a forward-facing position. The magnifier comes in assorted body colors such as black, and blue. The magnifier weighs 0.58 lbs, and comes housed in a protective shell and carrying case. It has a one-year limited warranty.

Diopter (D) is a technical term for the measurement of the light curvature and thickness of a lens. A dioptric number and a magnification number are not the same thing. Diopter strength represents a specific magnification power (X). For example, a 5-diopter provides 2.5X magnification (at a distance of 8”). The higher the diopter, the more magnification a lens can provide. As magnification increases, distance to the object (focal length), and field of view (diameter, or narrowness of view) decrease. Magnifiers and prescription eyeglasses have a diopter value, such as 1.5 or 2. The dioptric strength of an accessory lens, such as prescription eyeglasses or an eye loupe, must be added to the dioptric strength of the magnifier to calculate total magnification.

Magnifiers are devices used to enlarge the visual appearance of an object or image. Magnifiers come in a variety of styles such as hand-held, headband, standing, clip-on, eye loupe, and those that hang in a necklace form, or fit in a trouser pocket. Magnifiers are commonly made of plastic or glass. They can have one or more lenses with varying magnification abilities, and can have a binocular configuration with a single lens, or two separate lenses. They are sometimes used with LED or fluorescent light sources to help control viewing capabilities. Magnifier ability is often expressed as magnification at a specific length. For example, 1.75X at 14” means that when a magnifier is held at 14” from a viewer’s eyes, the object will be magnified 1.75 times (X) its actual size. As magnification increases, viewing areas and focal length decrease. Magnifiers sometimes have a diopter number, expressed as + or - D, which is a measurement of strength (or power) of the lens. Some magnifiers are marked with a dioptric number on the lens. A high diopter number has a higher magnification than a low diopter number. Aspheric magnifiers, unlike spheric magnifiers,


Determining Magnification

Focal length
(Distance from object)
Sample view
20/20 vision
20" (50.8cm)
No   Magnification
2-diopter lens
20" (50.8cm)
1.50x   Magnification
3-diopter lens
14" (35.56cm)
1.75x   Magnification
4-diopter lens
10" (25.4cm)
2.0x   Magnification
5-diopter lens
8" (20.32cm)
2.50x   Magnification
7-diopter lens
6" (15.24cm)
2.75x   Magnification
10-diopter lens
4" (10.16cm)
3.50x   Magnification

offers less distortion. Magnifiers are widely used in jewelry inspection and fabrication, watch- making, needlework, artwork, reading, print inspection, and stamp-collecting.

Donegan Optical manufactures and distributes precision visual devices for hobbyists and professionals in industry, home, office and crafts applications. The company was founded in 1952 and is headquartered in Lenexa, Kansas.

What’s in the Box?

  • OSC OptiSIGHT magnifier
  • Fitted, plastic, carrying case
  • Instruction manual


Gray color headband binocular visor with three magnifying lens plates for hands-free viewing

Interchangeable lens plates provide 3X, 4X, and 5X magnification

Optical-grade acrylic prismatic lenses for improved focus and reduced eye strain

Visor tension-adjustment knobs allow visor to tilt out of way when not needed

Can be worn over prescription or safety eyeglasses

Product Details:
Package Length: 11.9 inches
Package Width: 7.3 inches
Package Height: 2.2 inches
Package Weight: 0.45 pounds
Average Customer Rating: based on 48 reviews
Customer Reviews:
Average Customer Review: 4.5 ( 48 customer reviews )
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Most Helpful Customer Reviews

23 of 24 found the following review helpful:

5More than a toy: a useful tool.Oct 22, 2009
By Jerry Saperstein
I'm not sure why Amazon has this in the toy category, but it is also in tools and other categories as well. In any event, kids would appreciate this as a toy or a hobby aid.

No matter what you use OptiSight for, it is worth the money. I've owned several devices like this over the years and the older I get, the more I need them. Of course, devices like this aren't generally used every day, so they tend to get lost, packed away, whatever. I don't recall ever breaking one, though.

Anyway, this newest iteration is great. It comes with three magnifying lenses:

# 3 that magnifies 1.75x at 14 inch viewing distance
# 4 magnifies 2x at 10 inch viewing distance
# 5 magnifies 2.5x at 8 inch viewing distance

The lenses are plastic and not of the highest quality, but are more than adequate for normal uses. I wouldn't recommend using them for microelectronic assembly six hours a day, but for a couple of hours at a time, they work just fine.

Construction is very simple and robust. It is a band of formed plastic that will fit seemingly any adult head and those of older children. There is a simple tensioning mechanism that holds that lenses where you want them - and it works really well. You won't have to worry about the lenses slipping from the position you put them in. There is a poly strap included in the package - and you better be on the lookout for it, because it is hard to spot in the package - that you use to tighten the band around your head.

Field of view for the lenses is more than adequate for close work.

Overall, the OptiSight Magnifying Visor does the job it is intended to do. At the price, it is an excellent value and a very handy tool to have around when you need it.


10 of 10 found the following review helpful:

3Decent, but you can do better for $20Mar 21, 2011
By InspectorGadget
These are pretty decent. The color if fun. My 3-y-o wanted a flip-up goggle to play "Ghostbusters" and we're building a mock night-vision scope around these.

As a magnifier, they work pretty well. I use magnifying goggles all the time in my work because of my aging eyes. I can tell you that you can do much better for $20, though. These should sell for about $5. They don't have headband padding and the closure is a crummy slotted rubber strap that goes across the flanges on the two back bands. It has a lot of range -- goes from my 3-year-old's small head to my big man's head, but it doesn't fit as nicely as my $7 cheapo black visors (with Velcro closure) that have two flip-down sets of lenses PLUS a loupe.

Velcro closure of the bands would be better. Screw-down knob on the head-adjustment bands would be better.

The tensioning screws are a plus, though.

8 of 8 found the following review helpful:

5don't know how i got on without it...Oct 17, 2010
By H. B. Luttrell
The optiSIGHT visor is very lightweight and comfortable to wear. I usually forget that I have it on! The pivot for the lens carrier is excellent: it can be tightened to hold the lens at a specific level, or provide just enough tension to move it up and down as needed.

This model has plastic lenses, not glass like the more expensive models. I had concerns about the optical quality and durability, but I am happy to be wrong! The optics are clear, and should a lens ever be scratched, they are only around $5 to replace (not $25 like for glass).
It comes with 3 powers: 1.75X at 14" distance, 2X at 10" distance, and 2.5X at 8" distance.

Another lens is sold separately, the OptiSIGHT LE7 lensplate, which is 2X at a 6" viewing distance.

I thought that I would want more magnification, that 2.5X wouldn't be enough, but so far I am very pleased with this purchase. I can wear it while working for hours without headaches or eye strain. And my craftsmanship has improved!

4 of 4 found the following review helpful:

5I'm impressed and didn't expect to be...Nov 23, 2010
By W. Nicholls
I already have the more expensive Bausch & Lomb magnifying visor and I bought the OptiSight as an inexpensive backup to use in the dinosaur prep lab where I volunteer. While the Honeywell visor is indeed better made, the OptiSight is lighter and more comfortable to wear. The optical quality is as good as the Bausch & Lomb as far as I an tell. I have a large head size and the silicone rubber band provided with this visor is too short to use. However, I find the visor stays in place without the band and not using the band makes the visor easier to put on and remove, as well as making it more comfortable to wear. Folks with smaller hat sizes will need to use the rubber strap and therefore may not find the visor quite as comfortable.

Especially for the money, I'm very impressed with this product.

4 of 4 found the following review helpful:

5Excellent for making it possible to see hard to see work.Aug 23, 2008
By Ervsbookreviews
The Donegan Magnifier, OptiSight W/3 Lens Plates, 3X, 4X, 5X makes it very easy to see things that are hard to see without the Donegan Magnifier. I am very glad I purchased this item as it was money well spent. With the 3x, 4x. and 5x I can change lenses until I get the lens that works the best for me.

I am very pleased with this product and am very glad I purchased it.

Ervin E. Harmon

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